CH253880A - Process for the preparation of an azo dye of the pyrazolone series. - Google Patents
Process for the preparation of an azo dye of the pyrazolone series.Info
- Publication number
- CH253880A CH253880A CH253880DA CH253880A CH 253880 A CH253880 A CH 253880A CH 253880D A CH253880D A CH 253880DA CH 253880 A CH253880 A CH 253880A
- Authority
- CH
- Switzerland
- Prior art keywords
- nitro
- diazo
- pyrazolone
- hol
- methyl
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
- C09B33/02—Disazo dyes
- C09B33/12—Disazo dyes in which the coupling component is a heterocyclic compound
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 248805. Verfahren zur Herstellung eines Azofarbatoffes der Pyrazolonreihe. Gegenstand vorliegenden Patentes ist ein Verfahren zur Herstellung eines Azofarbstof- fes der Pyrazolonreihe. Das Verfahren ist da durch gekennzeichnet, dass man 1 Mol 1 ä 1)iazo-6-nitro-2-oxy-naphthalin-4-sulfonsäure, 1 Hol 5-Nitro-2-diazo-benzoesäure,
2 Mol 1- (4'-Amino-phenyl)-3-methyl-5-pyrazolon und 1 Mol Phosgen derart aufeinander einwirken lässt, dass ein Disazofarbstoff der Formel
EMI0001.0019
entsteht. Der neue, metallisierbare Disazofarbstoff stellt ein dunkles Pulver dar,
das sich in Wasser mit dunkelbrauner und in konzen trierter Schwefelsäure mit oranger Farbe löst und Cellulosefasern aus dem neutralen Glau- bersalzbad in rotstichig braunen Tönen färbt. welche durch Nachbehandlung mit Kupfer sulfat in ein Orange von sehr guter Nass- mnd Lichtechtheit übergehen.
Beispiel: 2<B><U>9,5</U></B> Teile 1.-Diazo-6-nitro-2-oxy-naphtha: hn-4-sulf onsättre werden mit 40,4 Teilen Harnstoff des 1-(4'-Amino-phenyl)-3-methyl- 5-pyrazolons bei Eiskühlung in Gegenwart von überschüssiger Soda, zum Zwischenpro dukt vereinigt. Dieses Zwischenprodukt kup pelt man alsdann in lackmusneutralem Me dium mit der Diazoverbindung aus 18,2 Tei len 5-Nitro-2-amino-benzoesäure zum Disazo- farbstoff weiter und isoliert den Farbstoff mit Kochsalz.
Zu demselben Farbstoff gelangt man, wenn man 1 Mol des Aminoazofarbstoffes, er halten durch Kupplung von diazotierter 1 Amino-6-nitro-2-oxy-naphthalin-4-sulf onsäure mit 1- (4'- Amino-phenyl)-3-methyl-5-pyrazo- lon, und 1 Mol des Aminoazofarbstoffes, er halten durch Kupplung von 5-Nitro-2-diazo- benzoesäure mit 1- (4'-Amino-phenyl) - 3 - me- thyl-5-pyrazolon,
mit Phosgen in sodaalkali- schem Medium bis zum Verschwinden der freien Aminogruppen zum asymmetrischen Harnstoff kondensiert.
Additional patent to main patent no. 248805. Process for the production of an azo carbate of the pyrazolone series. The present patent is a process for the production of an azo dye of the pyrazolone series. The process is characterized in that 1 mol 1 1) iazo-6-nitro-2-oxy-naphthalene-4-sulfonic acid, 1 hol 5-nitro-2-diazo-benzoic acid,
2 mol of 1- (4'-aminophenyl) -3-methyl-5-pyrazolone and 1 mol of phosgene can act on one another in such a way that a disazo dye of the formula
EMI0001.0019
arises. The new, metallizable disazo dye is a dark powder,
which dissolves in water with dark brown and concentrated sulfuric acid with an orange color and dyes cellulose fibers from the neutral Glauber's salt bath in reddish brown tones. which, after treatment with copper sulfate, turn into an orange with very good wet and lightfastness.
Example: 2 <B> <U> 9.5 </U> </B> parts of 1.-Diazo-6-nitro-2-oxy-naphtha: hn-4-sulfon saturates with 40.4 parts of urea are des 1- (4'-Amino-phenyl) -3-methyl-5-pyrazolones combined with ice-cooling in the presence of excess soda to give the intermediate product. This intermediate product is then coupled in litmus-neutral medium with the diazo compound of 18.2 parts of 5-nitro-2-aminobenzoic acid to give the disazo dye and the dye is isolated with sodium chloride.
The same dye is obtained if you add 1 mol of the aminoazo dye, he keep by coupling diazotized 1-amino-6-nitro-2-oxy-naphthalene-4-sulfonic acid with 1- (4'-aminophenyl) -3- methyl-5-pyrazolone, and 1 mole of the aminoazo dye, obtained by coupling 5-nitro-2-diazo-benzoic acid with 1- (4'-aminophenyl) -3-methyl-5-pyrazolone,
condensed with phosgene in a soda-alkaline medium until the free amino groups disappear to form asymmetric urea.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH248805T | 1945-12-27 | ||
CH253880T | 1945-12-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH253880A true CH253880A (en) | 1948-03-31 |
Family
ID=25729298
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH253880D CH253880A (en) | 1945-12-27 | 1945-12-27 | Process for the preparation of an azo dye of the pyrazolone series. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH253880A (en) |
-
1945
- 1945-12-27 CH CH253880D patent/CH253880A/en unknown
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